Cool! I was wondering about something like this.

I'm assuming that the problem lies in the H.264 codec not being fast enough to decode the very large desktop resolution iplayer will be sending out. I know they have different option for different devices. I'd been wondering how easy it would be to masquerade to iplayer as being a Wii (for which iplayer will use a higher bandwidth, lower complexity Sorensen Spark codec (H263 cut down)). I'm not sure exactly how they decide what an endpoint is though (the Wii iplayer broke recently when they moved from flash 7 to flash lite 3.1, which identifies itself as flash 9, making the iplayer servers dish out the H.264 version).

This sounds a better solution though. Is there anything I can do to help?